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A007946 as a simple table

na(n)
02
19
236
3140
4540
52079
68008
730888
8119340
9461890
101790712
116953544
1227041560
13105306075
14410605200
151602881040
166263890380
1724502865310
1895937144600
19375945078600
201474358525640
215786272150230
2222724268808176
2389301056353200
24351140573438200
251381487341784004

[2,9,36,140,540,2079,8008,30888,119340,461890,
 1790712,6953544,27041560,105306075,410605200,
 1602881040,6263890380,24502865310,95937144600,
 375945078600,1474358525640,5786272150230,
 22724268808176,89301056353200,351140573438200,
 1381487341784004]